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31. Since a great deal of day-to-day academic work is boring and repetitive, you need to be well motivated to keep doing it. A mathematician sharpens her pencils, works on a proof, tries a few approaches, gets nowhere, and finishes for the day. A writer sits down at his desk, produces a few hundred words, decides they are no good, throws them in the bin, and hopes for better inspiration tomorrow. To produce something worthwhile — if it ever happens — may require years of such fruitless labor. The Nobel Prize-winning biologist Peter Medawar said that about four-fifths of his time in science was wasted, adding sadly that "nearly all scientific research leads nowhere." What kept all of these people going when things were □□□□□.
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